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".PIERS. PMOTOJJTMOGHAPHER. WASHINGTON D C Quinn -taire strnt @frn MARK L'. ROBERTS, '0F CHATSWORTH, ILLINOIS.

Letters Patent No. 64,572, tinted May 7, 1867.

IMPROVEMENT IN ROTARY KNI'ITING MAGINES.

TO ALL WIIOM IT MAY CONCERN:

Be it known that I, MARK L. ROBERTS, of Chatsworth, in the county of Livingston, and State of Illinois, have invented new and useful Improvements in Knitting Machines; and I do hereby deelarethat thc following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had t0 the accompanying drawings, forming part of this specification. i

The present invention consists, first, in a novel manner of moving the device for throwing or operating the needles of thc machine; second, in so arranging the needle-operator thatits length of stroke and-consequently that of the needles of the machine moved or operated therebycan be adjusted and changed at pleasure, accord-A ing as it is desired to knit loose or close; third, in a novel manner df throwing or operating the thread or yarn= puller of the machine; and fourth, in so operating the yarn-presser of the machine that its movement can be reversed according as the machine is turned forward 'or backward, this movement being necessary for the knitting of the heel portion of' stockings and Suspenders, mitten's, or anything having a flat web. In the accompa- .n in e late of drawinffs ru im rovements in knittin machines are illustrated- D C) g Figure 1 being a plan or top view of themachine.

Figure 2, a side elevation; and

Figure 3, a detail view to be hereinafter referred to.

Similar letters of reference indicate like parts.

A A, in the drawings, represent thesupporting framework of the machine.' B the driving-shaft, turning in suitable bearings of the framework A, on one end of which shaft is xcd a friction-wheel, C, that through a balance or fly-wheel, D, against the inside periphery of which it is arranged to bear, is revolved, consequently revolving the shaft to which it is secured. E'the cylinder, carrying the knitting-ncedles F, which are arranged to more in suitable grooves'or ways of such cylinder. 'I This cylinder is suspended in a horizontal position upon the framework A, so as to freely turn or revolve, it being actuated by the driving-shaft, with which at its inner end it is connected through the series of teeth formed around such end, and the spirally arranged flange F upon the driving-shaft. G a cam-way or groove, around the drum H of driving-'shaft B, in which groove moves the friction-roller I of one end of a bent lever, J, hung so as to turn or swing in a horizontal plane upon a fulcrum-pin, K, of the framework A, with its outer end L engaged with the notch M of a cross-bar, N, pivoted at one end to a standard or upright, O, and at its other end to the upper endl) of the vertical arm Q, having at its lower end a foot-piece, It, by which the knitting-needles are opened as' they pass by and over the'same; this arm Q being hung and swinging upon a fulcrum at R" of the head-plate S above thc needle-cylinder.

The arrangement of the parts as above described is substantially similar to that in all knitting machines of the same class, and forms no part of the invention which is embraced in the present application; the description of such parts being only given herein for the purpose of enabling such parts oi' the'machine as are new to bc more fully and plainly understood.` I

On the cud of the shaft B having the spiral-screw ilangc F" is secured a circular disk or plate/Ih Up .s tud or pin, on the outer face of disk T, over which stud plays the vertical slotted arm V, forming a part ol the horizontal barvW extending over the needle-cylinder, but above it, and in the direction of its length, and hung at or near each end in fixed hangers or guides X of the framework A, through which it moves and plays in a horizontal plane forward and backward over the needle-cylinder, as the driving-shaft B,.to the disk 'I of which it is connected, as above described, revolves. Through this movement of the bar W the needles of the cylinder are carried forward and backward over the cylinder, they being acted upon in regular order and sue cession by the arm or carrier Y, attached to thc bar W, which carrier is made of an arch or curved shape extending partially around the cylinder, and is provided with a supplementary arm, Z. To enable the carrier Y to be adjusted 0n the bar XV I notch or tooth the upper edge of the said bar lV, for a portion of its length, with which teeth engages a spiral-screw nut, A2, hung upon one end of the carrier Y, by the turning of which tothe right or left the said carrier can he moved along and adjusted upon the har' W, either more or less., toward the vFront or knitting end of the needle-cylinder, according to the length of stroke or movement which it is desired to impart to the needle upon the cylinder; the said nut holding the carrier at 'any point at which it ma;l be .set upon the bar. 0n the upper side of the' carrier Y is an upright, Z2, which at its upper end isI 

